Question

我在重命名列并将更改迁移到数据库时遇到问题。

迁移：

    protected override void Up(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.RenameColumn(
            name: "int",
            schema: "Gamgoo.More",
            table: "Rating",
            newName: "GivenRating");
    }

    protected override void Down(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.RenameColumn(
            name: "GivenRating",
            schema: "Gamgoo.More",
            table: "Rating",
            newName: "int");
    }

我正在使用的命令（来自Package Manager Console / Powershell）：
添加迁移RatingFix -p Gamgoo.Data.Context -c GamgooContext
更新数据库

错误信息：

Applying migration '20180319172151_RatingFix'.
Microsoft.EntityFrameworkCore.Migrations[200402]
      Applying migration '20180319172151_RatingFix'.
fail: Microsoft.EntityFrameworkCore.Database.Command[200102]
      Failed executing DbCommand (31ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      EXEC sp_rename N'Gamgoo.More.Rating.int', N'GivenRating', N'COLUMN';
System.Data.SqlClient.SqlException (0x80131904): Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues)
ClientConnectionId:ba25aa03-122d-4c55-9673-4bd3358f2f83
Error Number:15248,State:1,Class:11
Failed executing DbCommand (31ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
EXEC sp_rename N'Gamgoo.More.Rating.int', N'GivenRating', N'COLUMN';
System.Data.SqlClient.SqlException (0x80131904): Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues)
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)
   at Microsoft.EntityFrameworkCore.Migrations.MigrationCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)
   at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationCommandExecutor.ExecuteNonQuery(IEnumerable`1 migrationCommands, IRelationalConnection connection)
   at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
   at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_1.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
ClientConnectionId:ba25aa03-122d-4c55-9673-4bd3358f2f83
Error Number:15248,State:1,Class:11
Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong.

我已经检查过ef核心github，论坛和stackoverflow等类似问题，但这些答案对我没有帮助。
我想避免删除所有迁移并更新数据库，因为我已经在其他表中有相当多的数据。

Answer 1

这可能已由PR #11161修复。您可以尝试the nightly builds。

您可以通过重写sp_rename调用解决此问题：

// UNDONE: SQL generated by EF Core is missing schema identifier quotes
//migrationBuilder.RenameColumn(
//     name: "int",
//     schema: "Gamgoo.More",
//     table: "Rating",
//     newName: "GivenRating");
migrationBuilder.Sql(
    "EXEC sp_rename N'[Gamgoo.More].[Rating].[int]', N'GivenRating', N'COLUMN';");

Answer 2

在尝试重命名已添加到标识User的列时遇到了同样的问题。在检查数据库之后，我意识到我已经创建了迁移以生成原始列，但从未真正更新数据库。早些时候，我很沮丧地删除了如果我实际上更新了数据库的情况下将产生该列的迁移。相当容易的修复-手动创建原始列，然后使用重命名的当前迁移按预期工作。

希望我的回答可能对其他人有所帮助。

使用迁移重命名列时出现EF Core 2.0错误

2 个答案: